Regular Expressions 101

I'm logged in as the literal text I'm logged in as (case sensitive)

Non-Capturing Group(?:a\s|an\s)

1st Alternativea\s

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\sany whitespace character

2nd Alternativean\s

anthe literal text an (case sensitive)

\sany whitespace character

Non-Capturing Group(?:"([^"]*)"\s)?

?repeats the group contents below at most once:

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1([^"]*)

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\sany whitespace character

Non-Capturing Group(?:user|customer)

1st Alternativeuser

userthe literal text user (case sensitive)

2nd Alternativecustomer

customerthe literal text customer (case sensitive)

\sany whitespace character

Non-Capturing Group(?:(?:for[\sa\s|\san\s]?)(?:"([^"]*)"\s))?

?repeats the group contents below at most once:

Non-Capturing Group(?:for[\sa\s|\san\s]?)

forthe literal text for (case sensitive)

Character Class[\sa\s|\san\s]?

?matches at most one character from the set below:

\sany whitespace character

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\sany whitespace character

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\sany whitespace character

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

\sany whitespace character

Non-Capturing Group(?:"([^"]*)"\s)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 2([^"]*)

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\sany whitespace character

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

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Search reference

Regular Expression

I'm logged in as (?:a\s|an\s)(?:"([^"]*)"\s)?(?:user|customer)\s(?:(?:for[\sa\s|\san\s]?)(?:"([^"]*)"\s))?

Unit Tests

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